The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 2003
Filed:
May. 23, 2002
Applicant:
Inventors:
Yoshihiko Hisatake, Ibaraki, JP;
Hiroshi Kuroda, Ibaraki, JP;
Assignee:
Eisai Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07H 1/104 ;
U.S. Cl.
CPC ...
C07H 1/104 ;
Abstract
The present invention provides an industrially excellent and novel process for producing methylcobalamin useful as medicines. Namely, it provides a process for producing methylcobalamin, which comprises the step of methylating cyanocobalamin or hydroxocobalamin in the presence of a reducing agent and a water-soluble methylating agent.